Methods and devices for barcode based communication and payment implementation

ABSTRACT

The present application provides a barcode-based communication method, including: rendering first transmission information into a first barcode, and displaying the first barcode for scanning by a peer device; and scanning a second barcode displayed by the peer device, to obtain second transmission information included in the second barcode, where the second transmission information is obtained by the peer device based on a processing result of the first transmission information. According to the technical solutions of the present application, two communication parties can perform bidirectional information transmission by using barcodes, to alleviate information asymmetry caused by unidirectional communication and improve service integrity and security.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.16/394,660, filed on Apr. 25, 2019, which is a continuation of PCTApplication No. PCT/CN2017/110788, filed on Nov. 14, 2017, which claimspriority to Chinese Patent Application No. 201611035515.0, filed on Nov.18, 2016, and each application is hereby incorporated by reference inits entirety.

TECHNICAL FIELD

The present application relates to the field of network communicationstechnologies, and in particular, to methods and devices for barcodebased communication and payment implementation.

BACKGROUND

A barcode includes a group of lines and spacing symbols that arearranged based on a specific coding rule, and is used to indicateinformation about a specific character, digit, or symbol. Examples ofbarcodes include one-dimensional barcodes and two-dimensional barcodes.The one-dimensional barcode is used to express information by arranginga plurality of black lines and spacings with different widths based on acertain rule. The two-dimensional barcode (also referred to as a quickresponse code) is used to record information by using a pattern withblack and white geometric figures alternated on a (two-dimensional)plane based on a certain rule.

With development of mobile Internet technologies and popularization ofintelligent terminals, barcodes are widely applied to various near fieldservices based on user accounts. Two users can implement services suchas mobile payment and information sharing between accounts by scanning aone-dimensional barcode or a two-dimensional code.

In the existing technology, barcode scanning communication between twodevices is unidirectional communication, and a device that displays thebarcode cannot obtain a processing result of information in the barcodefrom a device that scans the barcode. In response to determining that aservice is performed by using the barcode, such unidirectionalcommunication can cause information asymmetry between two communicationparties and affect service security and integrity.

For example, in response to determining that a payment service isperformed by using a barcode, a merchant cashier terminal with a codescanner obtains a user account after scanning a payment two-dimensionalcode displayed by a user terminal, and initiates a payment request to apayment server by using the user account, a merchant account, and anamount. After completing a transfer between the user account and themerchant account, the payment server separately sends a payment resultto the merchant cashier terminal and the user terminal. In response todetermining that a user is in an area such as a new development area, anunderground store, or a foreign country that is not covered by a mobiledata network, the user terminal cannot immediately receive the paymentresult while the merchant cashier terminal can receive the paymentresult because the merchant cashier terminal and the payment serverusually communicate with each other through a wired network and cansuccessfully complete the payment. Because of the previous informationasymmetry, the user cannot confirm a payment amount and whether thepayment is successful. Therefore, it is difficult to ensure the paymentsecurity of the user.

SUMMARY

In view of this, the present application provides a barcode-basedcommunication method, including: rendering first transmissioninformation into a first barcode, and displaying the first barcode forscanning by a peer device; and scanning a second barcode displayed bythe peer device, to obtain second transmission information included inthe second barcode, where the second transmission information isobtained by the peer device based on a processing result of the firsttransmission information.

The present application provides a barcode-based communication method,including: scanning a first barcode displayed by a peer device, toobtain first transmission information included in the first barcode;generating second transmission information based on a processing resultof the first transmission information; and rendering the secondtransmission information into a second barcode, and displaying thesecond barcode for scanning by the peer device.

The present application further provides a payment implementationmethod, and the method is applied to a payer device and includes:rendering payer information including payer account information into apayment barcode, and displaying the payment barcode for scanning by apayee device; and scanning a payment result barcode displayed by thepayee device, to obtain a payment result included in the payment resultbarcode, where the payment result is sent by a payment server to thepayee device after the payment server makes a payment from a payeraccount to a payee account based on a payment request including thepayer account information.

The present application provides a payment implementation method, andthe method is applied to a payee device and includes: scanning a paymentbarcode displayed by a payer device, to obtain payer information that isincluded in the payment barcode and that includes payer accountinformation; sending a payment request to a payment server, andreceiving, from the payment server, a payment response that includes apayment result, where the payment request includes the payer accountinformation, payee account information, and a payment amount, and thepayment result is generated by the payment server after the paymentserver makes a payment from a payer account to a payee account based onthe payer account information, the payee account information, and thepayment amount; and rendering the payment result into a payment resultbarcode, and displaying the payment result barcode for scanning by thepayer device.

The present application further provides a barcode-based communicationapparatus, including: a first barcode display unit, configured to renderfirst transmission information into a first barcode, and display thefirst barcode for scanning by a peer device; and a second barcodescanning unit, configured to scan a second barcode displayed by the peerdevice, to obtain second transmission information included in the secondbarcode, where the second transmission information is obtained by thepeer device based on a processing result of the first transmissioninformation.

The present application provides a barcode-based communicationapparatus, including: a first barcode scanning unit, configured to scana first barcode displayed by a peer device, to obtain first transmissioninformation included in the first barcode; a second transmissioninformation unit, configured to generate second transmission informationbased on a processing result of the first transmission information; anda second barcode display unit, configured to render the secondtransmission information into a second barcode, and display the secondbarcode for scanning by the peer device.

The present application further provides a payment implementationapparatus, and the apparatus is applied to a payer device and includes:a payment barcode display unit, configured to render payer informationincluding payer account information into a payment barcode, and displaythe payment barcode for scanning by a payee device; and a payment resultbarcode scanning unit, configured to scan a payment result barcodedisplayed by the payee device, to obtain a payment result included inthe payment result barcode, where the payment result is sent by apayment server to the payee device after the payment server makes apayment from a payer account to a payee account based on a paymentrequest including the payer account information.

The present application provides a payment implementation apparatus, andthe apparatus is applied to a payee device and includes: a paymentbarcode scanning unit, configured to scan a payment barcode displayed bya payer device, to obtain payer information that is included in thepayment barcode and that includes payer account information; a paymentresult receiving unit, configured to send a payment request to a paymentserver, and receive, from the payment server, a payment response thatincludes a payment result, where the payment request includes the payeraccount information, payee account information, and a payment amount,and the payment result is generated by the payment server after thepayment server makes a payment from a payer account to a payee accountbased on the payer account information, the payee account information,and the payment amount; and a payment result barcode display unit,configured to render the payment result into a payment result barcode,and display the payment result barcode for scanning by the payer device.

The present application further provides a code scanner, including animage acquisition module, where the image acquisition module isconfigured to obtain an image signal of a barcode displayed by a peerdevice, and further includes a processing module, a communicationsmodule, and a display module; where the processing module is configuredto decode the image signal obtained by the image acquisition module intoinput information, upload the input information to a host by using thecommunications module, render output information delivered by the hostby using the communications module into a barcode, and transmit thebarcode to the display module; the communications module is configuredto upload the input information to the host, and receive the outputinformation delivered by the host; and the display module is configuredto display the barcode obtained by randering the output information.

It can be seen from the previous technical solutions that in theimplementations of the barcode-based communication method and apparatusin the present application, after a communication party scans a firstbarcode displayed by the other communication party, and obtains firsttransmission information from the first barcode, the communication partygenerates second transmission information based on a processing resultof the first transmission information, and renders the secondtransmission information into a second barcode for scanning by the othercommunication party. Therefore, both of the communication parties canperform bidirectional information transmission by using barcodes, toalleviate information asymmetry caused by unidirectional communication,and improve service integrity and security.

In the implementations of the payment implementation method andapparatus in the present application, after scanning the payment barcodethat is of the payer device and that includes the payer accountinformation, the payee device sends the payment request to the paymentserver by using the payer account information, receives the paymentresult, and renders the payment result into the payment result barcodefor scanning by the payer device, so that the payer device can confirm apayment amount and the payment result without connecting to the paymentserver. Therefore, payment service integrity is ensured, and paymentsecurity of a user is improved.

In the implementation of the code scanner in the present application,the processing module renders the output information delivered by thehost into the barcode and then displays the barcode on a display screen,so that the code scanner implements a function of displaying a barcodefor scanning to a communication peer end, and the code scanner canperform barcode-based bidirectional communication, to provide animplementation basis for improving integrity and security of a serviceprocess.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a flowchart of a barcode-based communication method that isapplied to a communication party, according to Implementation 1 of thepresent application;

FIG. 2 is a flowchart of a barcode-based communication method that isapplied to the other communication party, according to Implementation 1of the present application;

FIG. 3 is a network structure diagram of an application scenario,according to Implementation 2 of the present application;

FIG. 4 is a flowchart of a payment implementation method that is appliedto a payer device, according to Implementation 2 of the presentapplication;

FIG. 5 is a flowchart of a payment implementation method that is appliedto a payee device, according to Implementation 2 of the presentapplication;

FIG. 6 is a schematic structural diagram of a code scanner, according toImplementation 3 of the present application;

FIG. 7 is a structural diagram of hardware of a device, according toImplementation 1 or Implementation 2 of the present application;

FIG. 8 is a logical structural diagram of a barcode-based communicationapparatus that is applied to a communication party, according to animplementation of the present application;

FIG. 9 is a logical structural diagram of a barcode-based communicationapparatus that is applied to the other communication party, according toan implementation of the present application;

FIG. 10 is a logical structural diagram of a payment implementationapparatus that is applied to a payer device, according to animplementation of the present application;

FIG. 11 is a logical structural diagram of a payment implementationapparatus that is applied to a payee device, according to animplementation of the present application; and

FIG. 12 is a flowchart illustrating an example of a computer-implementedmethod for barcode based communication, according to an implementationof the present disclosure.

DESCRIPTION OF IMPLEMENTATIONS

Implementation 1 of the present application provides a barcode-basedcommunication method. Assume that a communication party is device A, andthe other communication party is device B. Device A displays, to deviceB, a first barcode obtained by rendering first transmission information.After obtaining the first transmission information through scanning,device B generates second transmission information based on a processingresult of the first transmission information, renders the secondtransmission information into a second barcode, and displays the secondbarcode to device A for scanning. Device A obtains the secondtransmission information after scanning the second barcode. As such,barcode-based bidirectional communication between device A and device Bis implemented, information asymmetry between device A and device B thatis caused by unidirectional communication is alleviated, and a problemin the existing technology is alleviated.

In the present implementation, device A and device B serving as twocommunication parties can be any device that has computing, storage,display, and barcode scanning functions, for example, a mobile phone, atablet computer, a notebook computer, or a personal computer (PC) thathas a photographing function or an external barcode scanner.

In the present implementation, a procedure in which the barcode-basedcommunication method is applied to device A is shown in FIG. 1, and aprocedure in which the barcode-based communication method is applied todevice B is shown in FIG. 2.

Step 110: Device A renders first transmission information into a firstbarcode, and displays the first barcode for scanning by a peer device.

Step 210: Device B scans the first barcode displayed by the peer device,and obtains the first transmission information included in the firstbarcode.

Device A renders the first transmission information to be transmitted todevice B into the first barcode and then displays the first barcode.Device B scans the first barcode, and extracts the first transmissioninformation from image data of the scanned first barcode.

For a specific method for rendering information into a barcode andextracting the information from image data of the barcode, referencescan be made to the existing technology. In addition, the barcode in thepresent implementation can be a one-dimensional barcode or atwo-dimensional barcode.

Specific content of the first transmission information can be determinedbased on information that needs to be transmitted in a service procedurerelated to device A and device B in an actual application scenario, andis not limited in the present implementation. The first transmissioninformation can include one or more types of service information, devicecontrol information, and communication control information.

The service information is service data related to a service procedure.

The device control information is used to control a working statusparameter of device B, or control device B to perform a specifiedfunction operation, or not only control a working status parameter ofdevice B but also control device B to perform a specified functionoperation. The working status parameter includes various parametervalues or status values such as screen brightness of device B, a barcodedisplay time duration or a barcode display area and location that can beset or modified by a running unit such as an application, a process, ora thread on device B. The function operation includes various functionssuch as turning on/off a camera, photographing, recording, lighting up ascreen, and turning off the screen that can be started, run, anddisabled by a running unit such as an application, a procedure, or athread on device B.

The communication control information is used to notify device B of acurrent progress, a subsequent procedure, or a current progress and asubsequent procedure of information exchange. The current progress is aninformation exchange step that is in progress or completed on device A.For example, information 1 is received, or information 2 is beingprocessed. The subsequent procedure is a requirement of device A fordevice B in subsequent communication, for example, returning aninformation receiving acknowledgement, or returning an informationprocessing result.

Step 220: Device B generates second transmission information based on aprocessing result of the first transmission information.

After extracting the first transmission information, device B processesthe first transmission information based on a requirement of a serviceprocedure in an actual application scenario, to obtain the secondtransmission information. The second transmission information can begenerated after device B locally processes the first transmissioninformation; or device B can send the first transmission information toanother device, and then a processing result returned by the anotherdevice is used as the second transmission information; or device B canprocess the first transmission information, send an intermediateprocessing result to another device, and generate the secondtransmission information based on a response returned by the anotherdevice. Implementations are not limited thereto.

As described above, the first transmission information can include oneto more types of the service information, the device controlinformation, and the communication control information. In response todetermining that the first transmission information includes the devicecontrol information, after device B extracts the first transmissioninformation, device B performs at least one of the following: changingthe working status parameter of device B, or performing the specifiedfunction operation on device B based on the device control informationin the first transmission information. For example, in response todetermining that the first transmission information includes devicecontrol information “increasing screen brightness”, the screenbrightness of device B is increased in response to determining that thescreen brightness of device B does not reach a maximum value; or inresponse to determining that the first transmission information includesdevice control information “turning off a camera”, device B turns offthe camera of device B.

In response to determining that the first transmission informationincludes the communication control information, device B learns of atleast one of the current progress or the subsequent procedure of theinformation exchange with device A based on the communication controlinformation in the first transmission information; and generates thesecond transmission information based on at least one of the currentprogress or the subsequent procedure of the information exchange. Forexample, in response to determining that the first transmissioninformation includes communication control information “returning areceiving acknowledgement”, device B generates second transmissioninformation “information is received”; or in response to determiningthat the first transmission information includes communication controlinformation “returning an information processing result”, device B usesthe processing result as the second transmission information afterprocessing the first transmission information ends.

Step 230: Device B renders the second transmission information into asecond barcode, and displays the second barcode for scanning by the peerdevice.

Step 120: Device A scans the second barcode displayed by the peerdevice, to obtain the second transmission information included in thesecond barcode, where the second transmission information is generatedby the peer device based on the processing result of the firsttransmission information.

Device B renders the generated second transmission information into thesecond barcode, and displays the second barcode. Device A scans thesecond barcode displayed by device B, and extracts the secondtransmission information from image data of the second barcode.

Similarly, device B can encapsulate at least one of the device controlinformation or the communication control information in the secondtransmission information. In response to determining that the secondtransmission information includes device control information, afterdevice A extracts the device control information, device A performs atleast one of the following: changing a working status parameter ofdevice A, or performing a specified function operation based on thedevice control information; or in response to determining that thesecond transmission information includes communication controlinformation, after device A extracts the communication controlinformation, device A performs at least one of the following: learningof a current progress of information exchange with device B, orperforming a subsequent process of the information exchange with deviceB based on the communication control information.

For example, in response to determining that the second transmissioninformation includes communication control information “continuing toscan the next barcode”, device A continues to invoke a camera to scan ascreen of device B until the next barcode (a barcode different from thecurrently received barcode, a barcode displayed after the screen ofdevice B is turned off and lit up again, or the subsequently displayedbarcode) is scanned.

By using the previous steps, bidirectional communication between deviceA and device B can be performed by scanning barcodes. After thecommunication between the two parties ends, device A and device B cansend prompt signals such as a prompt tone or vibration to respectiveusers, to notify the users that the communication ends. Device A anddevice B can notify, by using communication control information in thebarcode, each other that the communication ends, or a running unit suchas an application or a process that runs a service procedure can end thecommunication. Implementations are not limited thereto.

It can be seen that in the present implementation, device A displays, todevice B, the first barcode obtained by rendering the first transmissioninformation. Device B scans the first barcode displayed by device A andobtains the first transmission information from the first barcode,generates the second transmission information based on the processingresult of the first transmission information, and renders the secondtransmission information into the second barcode for scanning by DeviceA. As such, barcode-based bidirectional communication between device Aand device B is implemented, information asymmetry between device A anddevice B that is caused by unidirectional communication is alleviated,and service integrity and security are improved.

Implementation 2 of the present application provides a paymentimplementation method. A payee device scans a payment barcode, of apayer device, that includes payer account information. After requestinga payment from a payment server by using the payer account information,the payee device renders a payment result into a payment result barcode,and displays the payment result barcode to the payer device forscanning, so that the payer device can immediately learn of the paymentresult without connecting to the payment server. Therefore, paymentsecurity of a user is improved, and a problem in the existing technologyis alleviated.

FIG. 3 shows a network structure of an application scenario, accordingto the present implementation. The payee device and the payment servercan access each other through a communications network, and the payerdevice and the payee device perform near field communication by scanninga barcode. The payee device and the payer device can be any device thathas computing, storage, display, and barcode scanning functions, forexample, a mobile phone, a tablet computer, a notebook computer, or apersonal computer (PC) that has a photographing function or an externalbarcode scanner. The payee device can be a cashier terminal that has abarcode scanning and display function. The payment server can be onephysical or logical server, or can be two or more physical or logicalservers that take different responsibilities and cooperate with eachother to implement functions of the payment server in the presentimplementation.

In the present implementation, a procedure in which a paymentimplementation method is applied to the payer device is shown in FIG. 4,and a procedure in which the payment implementation method is applied tothe payee device is shown in FIG. 5. For content in the presentimplementation that is the same as that in Implementation 1, details areomitted here for simplicity. For details, references can be made toImplementation 1.

Step 410: The payer device renders payer information including payeraccount information into a payment barcode, and displays the paymentbarcode for scanning by the payee device.

Step 510: The payee device scans the payment barcode displayed by thepayer device, to obtain the payer information that is included in thepayment barcode and that includes the payer account information.

After receiving a payment operation performed by a user serving as apayer, the payer device generates the payer information, and the payerinformation includes the payer account information. The payer accountinformation can be any information that can uniquely represent the payeraccount on a payment server, such as a registered user name of thepayer, or an account code of a payer account in a payment system. Inaddition, the payer device can further add at least one of devicecontrol information or communication control information to the payerinformation. The payer device renders the payer information into thepayment barcode, and displays the barcode on a screen for scanning bythe payee device.

The payee device scans the payment barcode displayed by the payerdevice, obtains the payer information by parsing image data of thepayment barcode, and extracts the payer account information from thepayer information.

For a specific method for rendering information into a barcode andextracting the information from image data of the barcode, referencescan be made to the existing technology. In addition, the barcode in thepresent implementation can be a one-dimensional barcode, atwo-dimensional barcode, or another type of barcode.

Step 520: The payee device sends a payment request to a payment server,and receives, from the payment server, a payment response that includesa payment result, where the payment request includes the payer accountinformation, payee account information, and a payment amount, and thepayment result is generated by the payment server after the paymentserver makes a payment from a payer account to a payee account based onthe payer account information, the payee account information, and thepayment amount.

The payee device encapsulates the payer account information, the payeeaccount information, and the payment amount from the payer to a payee inthe payment request, and sends the payment request to the paymentserver. Similarly, the payee account information can be any informationthat can uniquely represent the payee account on the payment server.

The payment server transfers an amount equal to the payment amount fromthe payer account to the payee account. After the transfer succeeds, apayment success is used as the payment result. In response todetermining that the transfer fails due to an abnormal state of thepayee account or the payer account, an insufficient balance of the payeraccount, etc., a payment failure is used as the payment result. Thepayment server encapsulates the payment result in the payment response,and sends the payment response to the payee device.

Step 530: The payee device renders the payment result into a paymentresult barcode, and displays the payment result barcode for scanning bythe payer device.

Step 420: The payer device scans the payment result barcode displayed bythe payee device, to obtain the payment result included in the paymentresult barcode, where the payment result is sent by the payment serverto the payee device after the payment server makes the payment from thepayer account to the payee account based on the payment requestincluding the payer account information.

The payee device receives the payment response, extracts the paymentresult from the payment response, performs corresponding serviceprocessing based on whether the payment is successful, renders thepayment result into the payment result barcode, and displays the paymentresult barcode on a screen.

The payer device scans the payment result barcode displayed on thescreen of the payee device, and obtains the payment result by parsingimage data of the payment result barcode.

After the payee device scans the payment barcode displayed by the payerdevice, it takes the payee device a long time to display the paymentresult barcode for scanning by the payer device. In this period, thepayer device keeps scanning the screen of the payee device and consumesa lot of power. The payer device is usually a mobile device of a user,and power consumption is a key indicator.

Therefore, in an example, after obtaining the payer information includedin the payment barcode, the payee device can render waiting processcontrol information into a waiting process control barcode, and displaythe waiting process control barcode on the screen for scanning by thepayer device. The waiting process control information includes devicecontrol information, and the device control information is used toperform the at least one of the following: changing a working statusparameter of the payer device, or performing a specified functionoperation. For example, the waiting process control information can beadjusting screen brightness, turning off a camera for a predeterminedtime and then turning on the camera, or a combination thereof. Afterscanning the waiting process control barcode, the payer device performsat least one of the following: changing the working status parameter ofthe payer device, or performing the specified function operation basedon the device control information included in the waiting processcontrol barcode, to save power.

In response to determining that the payee device displays the waitingprocess control barcode after obtaining the payer information, to reducepower consumption of the payer device, the payer device further needs tocontinue to scan the payment result barcode of the payee device. It canbe specified in a payment procedure of the payer and a cashier procedureof the payee that after scanning the payment barcode, the payee devicesuccessively displays two barcodes to the payer device, to respectivelytransmit control information and the payment result, and the payerdevice scans, under control of a running unit such as an application ora process that runs the payment procedure, the two barcodes successivelydisplayed by the payee device; or the payee device can add communicationcontrol information to the waiting process control information, thecommunication control information includes a notification messageinstructing the payer device to continue to scan the next barcode, and,after scanning the waiting process control barcode, the payer deviceextracts the communication control information and can learn that thepayee can further display the next barcode for scanning by the payerdevice.

In another example, after the payment barcode is displayed for apredetermined display time, the payer device can start to scan thepayment result barcode. Specifically, the payer device can start a timerin response to determining to display the payment barcode on the screen,the predetermined display time is set on the timer, and the payer devicestarts to scan the payment result barcode in response to determiningthat the timer expires. The predetermined display time can be determinedbased on factors such as a processing speed of the payee device, or atime required for information exchange between the payee and the paymentserver. Delaying the start of scanning can save power of the payerdevice.

In some application scenarios, in response to determining that the payerdevice can normally communicate with the payment server, the paymentserver can directly send the payment result to the payer device. Amethod in which the payer device is notified of the payment result byusing the payment result barcode in the present implementation is usedonly in response to determining that the payer device cannot communicatewith the payment server. The following two implementations can be usedin these application scenarios:

Implementation 1: In response to determining that the payer devicecannot normally communicate with the payment server, in response todetermining that the payer device generates the payer information, thepayer device adds, to the payer information, communication controlinformation instructing to return the payment result. The communicationcontrol information is used to request the payee device to feed back thepayment result to the payer device by using a barcode. In addition,after displaying the payment barcode, the payer device scans the screenof the payee device, to receive information returned by the payee deviceby using the barcode. In response to determining that the payer devicecan normally communicate with the payment server, the payer device doesnot add, to the payer information, communication control informationinstructing to return the payment result, and does not need to scan thepayment result barcode of the payee device. In response to determiningthat the payer information includes the communication controlinformation instructing to return the payment result, the payee devicerenders the payment result into the payment result barcode, and displaysthe payment result barcode for scanning by the payer device; otherwise,the payee device does not need to generate or display the payment resultbarcode.

Implementation 2: In response to determining that the payer devicecannot normally communicate with the payment server, after the payerdevice displays the payment barcode, the payer device scans the paymentresult barcode displayed by the payee device, to obtain the paymentresult included in the payment result barcode; otherwise, the payerdevice does not need to scan the payment result barcode of the payeedevice. In response to determining that the payment server cannotnormally communicate with the payer device, and the payment servergenerates the payment response, the payment server encapsulates, in thepayment response, a notification indicating that the payer device goesoffline. In response to determining that the payment response receivedfrom the payment server includes the notification indicating that thepayer device goes offline, the payee device renders the payment resultinto the payment result barcode, and displays the payment result barcodefor scanning by the payer device; otherwise, the payee device does notneed to generate or display the payment result barcode.

It can be seen that in the present implementation, the payee devicescans the payment barcode that is of the payer device and that includesthe payer account information, sends the payment request to the paymentserver by using the payer account information, receives the paymentresult, renders the payment result into the payment result barcode, anddisplays the payment result barcode to the payer device for scanning, sothat the payer device can confirm a payment amount and the paymentresult without connecting to the payment server. As such, paymentservice integrity and payment security of the user are improved.

In the existing technology, a code scanner used by a payee can usuallyonly scan a barcode on another object or device, and does not have adisplay screen or a function of generating and displaying a barcode.Such a code scanner or a host connected to the code scanner cannot beused as a party that performs bidirectional communication by usingbarcodes in the present application. Therefore, Implementation 3 of thepresent application provides a code scanner. The code scanner has adisplay screen, and has a function of receiving information delivered bya host and rendering the information into a barcode for display. In thepresent implementation of the present invention, such a code scanner ora host connected to the code scanner can be used as a party ofbidirectional communication, to alleviate information asymmetry causedby unidirectional communication.

The code scanner in the present implementation is connected to the hostby using a wired or wireless communications interface, and can uploadinformation to the host and receive information delivered by the host.The host can be any device that has computing and storage functions. Inthe present implementation, a type of the host, a communication methodbetween the host and the code scanner, and a communications protocol arenot limited.

In the present implementation, a structure of the code scanner is shownin FIG. 6, and includes an image acquisition module, a display module, aprocessing module, and a communications module.

The image acquisition module is configured to obtain an image signal ofa barcode displayed by a communication peer device.

The processing module is configured to decode the image signal obtainedby the image acquisition module into input information, upload the inputinformation to the host by using the communications module, renderoutput information delivered by the host by using the communicationsmodule into a barcode, and transmit the barcode to the display module.

The communications module is configured to upload the input informationto the host, and receive the output information delivered by the host.

The display module is configured to display the barcode obtained byrandering the output information.

Specifically, during scanning, the image acquisition module obtains,through photographing, reflection based imaging, etc., the image signalof the barcode displayed by the communication peer device, and transmitsthe image signal to the processing module. The processing module decodesthe image signal obtained by the image acquisition module into the inputinformation, and transmits the input information to the communicationsmodule. The communications module uploads the input information from theprocessing module to the host. To display the barcode, the host deliversthe output information to the communications module. The communicationsmodule transmits the received output information to the processingmodule. The processing module renders the output information deliveredby the host into the barcode, and then transmits the barcode to thedisplay module. The display module displays the generated barcode on adisplay screen (the display module includes the display screen).

The previous constituent modules of the code scanner are usuallyencapsulated inside a housing of the code scanner. In some applicationscenarios, one side of the housing of the code scanner is an open sideor a side made of a transparent material, the display screen is disposedinside an opposite side of the open side or the transparent side, and adistance between the display screen and the open side or the transparentside is determined based on a focal length of a front-facing camera of amainstream mobile phone model.

Specifically, a housing with an open side forms a horizontally placedbarrel-type structure. An unclosed side of a barrel forms the open sideof the housing. A cross-sectional shape of the barrel can be arectangle, a round rectangle, a circle, an ellipse, etc., and is notlimited. The display screen in the display module is installed on theopposite side (the opposite side can be considered as a bottom of thehorizontally placed barrel) of the open side, and is installed insidethe housing. In other words, content displayed on the display screen canbe seen from the open side. Another side of a housing having atransparent side can or cannot be made of a transparent material. Thedisplay screen is installed on an opposite side of the open side or thetransparent side, and is installed inside the housing. In other words,content displayed on the display screen can be seen through thetransparent side.

Focal lengths of front-facing cameras of various mainstream mobile phonemodels are collected, and a distance close to the focal lengths is usedas a distance between the display screen and the open side or thetransparent side, so that in response to determining that a user placesa screen of a mobile phone near the open side or the transparent side, abarcode displayed on the display screen can be conveniently displayed,to facilitate an operation of the user.

It can be seen that in the present implementation, the code scanner cannot only scan the barcode of the communication peer device to obtain theinput information, but also render the output information to betransmitted to the peer device into a barcode for display, so that thepeer device scans the barcode. The code scanner has a function ofperforming a barcode-based bidirectional communication, to provide animplementation basis for improving integrity and security of a serviceprocess.

In an application example of the present application, a merchant cashierterminal is externally connected to the code scanner in Implementation3, scans a payment two-dimensional code displayed by a paymentapplication (app) of a third-party payment platform on the mobile phoneof the user, and performs mobile payment by using a payment server ofthe third-party payment platform. A payment procedure is as follows:

The user opens the payment app on the mobile phone and confirms apayment operation. In response to determining that the payment app cancommunicate with the payment server, user account information is used aspayer information; otherwise, user account information and communicationcontrol information instructing to return a payment result are used aspayer information. The payment app renders the payer information into apayment two-dimensional code and displays the payment two-dimensionalcode on the screen of the mobile phone. In response to determining thatthe payment app cannot communicate with the payment server, the paymentapp turns on a front-facing camera, to start to scan the two-dimensionalcode.

The user aims the screen of the mobile phone at a code scanner of amerchant. A cashier person of the merchant starts the code scanner, toscan the payment two-dimensional code. The code scanner uploads thepayer information obtained through decoding to the merchant cashierterminal.

The merchant cashier terminal extracts the user account information fromthe payer information, encapsulates, in a payment request, the useraccount information, merchant account information, and order informationincluding a payment amount, and sends the payment request to the paymentserver, to request deduction for such a transaction.

The payment server transfers the payment amount from a user account to amerchant account. The payment result is a payment success. The paymentresult is encapsulated in a payment response and is sent to the merchantcashier terminal. In addition, the payment result is pushed to thepayment app of the mobile phone of the user. In response to determiningthat the payment server cannot normally communicate with the paymentapp, the payment app cannot receive in time a push message including thepayment result.

The merchant cashier terminal receives the payment response from thepayment server, obtains the payment result from the payment response,and performs a service processing procedure after payment succeeds. Inresponse to determining that the payer information from the mobile phoneof the user does not include the communication control informationinstructing to return the payment result, the payment procedure ends;otherwise, the merchant cashier terminal sends the payment result to thecode scanner as the output information, and the code scanner renders thepayment result into a payment result two-dimensional code and displaysthe payment result two-dimensional code on the display screen of thecode scanner.

The payment app of the mobile phone of the user scans the payment resulttwo-dimensional code, obtains the payment result after decoding thepayment result two-dimensional code, and displays, to the user, amessage indicating the payment amount and a successful payment.

Corresponding to the procedure implementations in Implementation 1 andImplementation 2, implementations of the present application furtherprovide a barcode-based communication apparatus applied to acommunication party, a barcode-based communication apparatus applied tothe other communication party, a payment implementation apparatusapplied to a payer device, and a payment implementation apparatusapplied to payee device. All the four apparatuses can be implemented byusing software, hardware, or a combination of software and hardware.Software implementation is used as an example. As a logical apparatus,the software is formed after a central processing unit (CPU) in a devicein which the software is located reads a corresponding computer programinstruction to a memory for running. In terms of hardware, in additionto a CPU, a memory, and a nonvolatile memory shown in FIG. 7, the devicein which the apparatus is located usually further includes at least oneof other hardware such as a chip for sending or receiving a radiosignal, or other hardware such as a card configured to implement anetwork communication function.

FIG. 8 shows a barcode-based communication apparatus, according to animplementation of the present application. The apparatus includes afirst barcode display unit and a second barcode scanning unit. The firstbarcode display unit is configured to render first transmissioninformation into a first barcode, and display the first barcode forscanning by a peer device. The second barcode scanning unit isconfigured to scan a second barcode displayed by the peer device, toobtain second transmission information included in the second barcode.The second transmission information is obtained by the peer device basedon a processing result of the first transmission information.

Optionally, the first transmission information includes at least one ofdevice control information or communication control information, thedevice control information is used to perform at least one of thefollowing: controlling a working status parameter of the peer device, orperforming a specified function operation, and the communication controlinformation is used to notify the peer device of at least one of acurrent progress or a subsequent procedure of information exchange.

Optionally, the second transmission information includes at least one ofdevice control information or communication control information. Theapparatus further includes a device and communication control unit,where the device and communication control unit is configured to performat least one of the following: changing a working status parameter of alocal device, or performing a specified function operation based on thedevice control information in the second transmission information; orlearning of a current progress of information exchange with the peerdevice, or performing a subsequent procedure of the information exchangewith the peer device based on the communication control information inthe second transmission information.

Optionally, the apparatus further includes a communication end promptunit, where the communication end prompt unit is configured to send aprompt signal after communication with the peer device ends.

FIG. 9 shows a barcode-based communication apparatus, according to animplementation of the present application. The apparatus is applied to adevice of the other communication party, and includes a first barcodescanning unit, a second transmission information unit, and a secondbarcode display unit. The first barcode scanning unit is configured toscan a first barcode displayed by a peer device, to obtain firsttransmission information included in the first barcode. The secondtransmission information unit is configured to generate secondtransmission information based on a processing result of the firsttransmission information. The second barcode display unit is configuredto render the second transmission information into a second barcode, anddisplay the second barcode for scanning by the peer device.

Optionally, the first transmission information includes device controlinformation. The apparatus further includes a device control unit, wherethe device control unit is configured to perform at least one of thefollowing: changing a working status parameter of a local device, orperforming a specified function operation based on the device controlinformation in the first transmission information.

Optionally, the first transmission information includes communicationcontrol information. The second transmission information unit isconfigured to learn of at least one of a current progress or asubsequent procedure of information exchange with the peer device basedon the communication control information in the first transmissioninformation; and generate the second transmission information based onat least one of the current progress or the subsequent procedure of theinformation exchange.

Optionally, the second transmission information includes at least one ofdevice control information or communication control information, thedevice control information is used to perform at least one of thefollowing: controlling a working status parameter of the peer device, orperforming a specified function operation, and the communication controlinformation is used to notify the peer device of at least one of acurrent progress or a subsequent procedure of information exchange.

Optionally, the apparatus further includes a communication end promptunit, where the communication end prompt unit is configured to send aprompt signal after communication with the peer device ends.

FIG. 10 shows a payment implementation apparatus, according to animplementation of the present application. The apparatus is applied to apayer device, and includes a payment barcode display unit and a paymentresult barcode scanning unit. The payment barcode display unit isconfigured to render payer information including payer accountinformation into a payment barcode, and display the payment barcode forscanning by a payee device. The payment result barcode scanning unit isconfigured to scan a payment result barcode displayed by the payeedevice, to obtain a payment result included in the payment resultbarcode. The payment result is sent by a payment server to the payeedevice after the payment server makes a payment from a payer account toa payee account based on a payment request including the payer accountinformation.

Optionally, the payment result barcode scanning unit is configured tostart to scan the payment result barcode after the payment barcode isdisplayed for a predetermined display time.

In an implementation, the payment result barcode scanning unit isconfigured to: in response to determining that the payer device cannotcommunicate with the payment server, scan the payment result barcodedisplayed by the payee device, to obtain the payment result included inthe payment result barcode.

In another implementation, in response to determining that the payerdevice cannot communicate with the payment server, the payer informationfurther includes: communication control information instructing toreturn the payment result, to instruct the payee device to generate anddisplay the payment result barcode.

In an example, the apparatus further includes a waiting process controlbarcode scanning unit, where the waiting process control barcodescanning unit is configured to: before the payment result barcodedisplayed by the payee device is scanned, scan a waiting process controlbarcode displayed by the payee device, and perform at least one of thefollowing: changing a working status parameter of the payer device, orperforming a specified function operation based on device controlinformation included in the waiting process control barcode.

In the previous example, the device control information includes atleast one of the following: turning down screen brightness, or turningoff a camera for a predetermined time and then turning on the camera.

In the previous example, the waiting process control barcode furtherincludes communication control information, and the communicationcontrol information includes a notification message that instructs thepayer device to continue to scan the next barcode.

FIG. 11 shows a payment implementation apparatus, according to animplementation of the present application. The apparatus is applied to apayee device, and includes a payment barcode scanning unit, a paymentresult receiving unit, and a payment result barcode display unit. Thepayment barcode scanning unit is configured to scan a payment barcodedisplayed by a payer device, to obtain payer information that isincluded in the payment barcode and that includes payer accountinformation. The payment result receiving unit is configured to send apayment request to a payment server, and receive, from the paymentserver, a payment response that includes a payment result, where thepayment request includes the payer account information, payee accountinformation, and a payment amount, and the payment result is generatedby the payment server after the payment server makes a payment from apayer account to a payee account based on the payer account information,the payee account information, and the payment amount. The paymentresult barcode display unit is configured to render the payment resultinto a payment result barcode, and display the payment result barcodefor scanning by the payer device.

In an implementation, the payer information further includescommunication control information instructing to return the paymentresult. The payment result barcode display unit is configured to: inresponse to determining that the payer information includes thecommunication control information instructing to return the paymentresult, render the payment result into the payment result barcode, anddisplay the payment result barcode for scanning by the payer device.

In another implementation, the payment response further includes anotification indicating that the payer device goes offline. The paymentresult barcode display unit is configured to: in response to determiningthat the payment response includes the notification indicating that thepayer device goes offline, render the payment result into the paymentresult barcode, and display the payment result barcode for scanning bythe payer device.

In an example, the apparatus further includes a waiting process controlbarcode display unit, where the waiting process control barcode displayunit configured to: after the payer information included in the paymentbarcode is obtained, render waiting process control information into awaiting process control barcode, and display the waiting process controlbarcode for scanning by the payer device. The waiting process controlinformation includes device control information used to perform at leastone of the following: changing a working status parameter of the payerdevice, or performing a specified function operation.

In the previous example, the device control information includes atleast one of the following: turning down screen brightness, or turningoff a camera for a predetermined time and then turning on the camera.

In the previous example, the waiting process control barcode furtherincludes communication control information, and the communicationcontrol information includes a notification message that instructs thepayer device to continue to scan the next barcode.

FIG. 12 is a flowchart illustrating an example of a computer-implementedmethod 1200 for two way communication using barcodes, according to animplementation of the present disclosure. For clarity of presentation,the description that follows generally describes method 1200 in thecontext of the other figures in this description. However, it will beunderstood that method 1200 can be performed, for example, by anysystem, environment, software, and hardware, or a combination ofsystems, environments, software, and hardware, as appropriate. In someimplementations, various steps of method 1200 can be run in parallel, incombination, in loops, or in any order.

At 1202, an origin device, which can be a first device in a pair ofdevices, or a first device among a plurality of devices, can determinefirst transmission information to transmit as or in an outgoingtransmission to be sent to a peer device. In an example the origindevice may be a payer device, and the peer device might be a payeedevice. The communication between devices might be a financial exchange,such as the purchase of a good or service, wherein funds are transferredfrom the payer device to the payee device. The outgoing transmission maycontain at least one of service information, device control information,or communication control information. The service information is servicedata related to a service procedure. The device control information maybe used to perform at least one of controlling a working statusparameter of the peer device or performing a specific functionoperation. In some instances, the communication control information maybe used to notify the peer device of the progress of the currentinformation exchange, or a subsequent procedure of information exchange.From 1202, method 1200 proceeds to 1204.

At 1204, a first barcode is generated based on the first transmissioninformation. Generating the first barcode may include converting theinformation in the first transmission into the first barcode. The firstbarcode in the present implementation can be a one-dimensional barcodeor a two-dimensional barcode, such as a QR-code. From 1204, method 1200proceeds to 1206.

At 1206, the first barcode can be displayed by, or otherwise madevisually available by the origin device for scanning by the peer device.In one instance, the origin device may be a mobile device, and the firstbarcode may be displayed on the device screen. From 1206, method 1200proceeds to 1208.

At 1208, the first barcode is scanned by the peer device. In oneexample, the peer device may use a front-facing camera to scan the firstbarcode. In another example, an external scanner that is communicativelycoupled with the peer device may be employed to scan the displayed firstbarcode. From 1208, method 1200 proceeds to 1210.

At 1210, the peer device prepares second transmission information basedon a processing result of the first transmission information. In someinstances, the second transmission information can contain at leastdevice control information or communication control information. In someinstances, the device control information may be used to perform atleast one of controlling a working status parameter of the origin deviceor performing a specific function operation. The communication controlinformation may be used, for example, to notify the origin device of theprogress of the current information exchange, as well as oralternatively, a subsequent procedure of information exchange. From1210, method 1200 proceeds to 1212.

At 1212, a second barcode is generated comprising at least the secondtransmission information. In some instances the generation of the secondbarcode may include converting the second transmission information intoa second barcode. The second barcode in the present implementation canbe a one-dimensional barcode or a two-dimensional barcode. From 1212,method 1200 proceeds to 1214.

At 1214, the second barcode can be displayed by or otherwise madevisually available by the peer device for scanning by the origin device.In one instance, the peer device may be a mobile device, and the secondbarcode may be displayed on the device screen. In another instance, thepeer device may have separate display that is commutatively coupled withthe peer device and configured to display the second barcode. From 1214,method 1200 proceeds to 1216.

At 1216, the second barcode is scanned by the origin device. In oneexample, the origin device may use a front-facing camera to scan thesecond barcode. In another example, an external scanner that iscommunicatively coupled with the origin device may be employed to scanthe displayed second barcode. From 1216, method 1200 proceeds to 1218.

At 1218, the origin device processes the second barcode and retrievesthe second transmission information. The retrieval of the secondtransmission information may be conducted by converting the secondbarcode back into the second transmission information. From 1218, method1200 proceeds to 1220.

At 1220, the origin device may, in response to the second transmissioninformation, change a working status parameter locally at the origindevice, or perform a specific function based on the device controlinformation received. Examples of this may include the origin devicechanging screen brightness or activating/deactivating a front-facingcamera. From 1220, method 1200 proceeds to 1222.

At 1222, the origin device may determine the progress of informationexchange, or need to perform a subsequent procedure of the informationexchange with the peer device based on the communication controlinformation received. Examples of this may include “returning areceiving acknowledgement,” “continuing to scan next barcode,” or “nofurther information exchange is required.” From 1222, method 1200proceeds to 1224.

At 1224, in response to the origin device determining no furtherinformation exchange is required, it may provide a prompt signal such asa tone or a vibration to the user to indicate the exchange ofinformation is complete. After 1224, method 1200 stops.

In particular, example methods include determining outgoing transmissioninformation to be sent to a peer device that contains at least serviceinformation, device control information, or communication controlinformation. The service information is service data related to aservice procedure. The device control information may be used to performat least one of: controlling a working status parameter of the peerdevice, or performing a specific function operation. The communicationcontrol information may be used to notify the peer device of theprogress of the current information exchange, or a subsequent procedureof information exchange. The outgoing transmission information is thenconverted to a barcode, and displayed by an origin device for scanningby the peer device.

The peer device then prepares a return transmission based on aprocessing result of the outgoing transmission. The return transmissioncontains at least device control information or communication controlinformation. The device control information may be used to perform atleast one of: controlling a working status parameter of the origindevice, or performing a specific function operation. The communicationcontrol information may be used to notify the origin device of theprogress of the current information exchange, or a subsequent procedureof information exchange. The return transmission is then converted to abarcode, and received by the origin device.

In response to receiving the return transmission, the origin device maychange a working status parameter locally, or perform a specificfunction based on the device control information received. The origindevice may also determine the progress of information exchange, or needto perform a subsequent procedure of the information exchange with thepeer device based on the communication control information received. Ifthe origin device determines no further information exchange isrequired, it may provide a prompt signal such as a tone or a vibrationto the user when the exchange of information is complete.

In one implementation, the origin device may be a payer device, and thepeer device may be a payee device. In this case, the outgoingtransmission may contain payer information including payer accountinformation. The return transmission may be comprised of a paymentresult barcode, containing payment results that were sent to the payeedevice from a payment server. The payment result barcode may bedisplayed in response to determining the payer device is unable tocommunicate with the payment server. The payer device may transmit inthe outgoing transmission that it is unable to communicate with thepayment server, and include in the communication control information,instructions for the payee device to generate and display the paymentresults barcode. The return transmission may be comprised of a waitingprocess control barcode, which upon scanning by the payer device, causesthe payer device to change a working status parameter, or perform aspecific function operation based on device control informationcontained in the waiting process control barcode. For example, thedevice control information may include adjusting screen brightness andadjusting camera status among other things.

As described herein, the present solution and description relates toimplementations of two way communication using barcodes. A technicaladvantage of this method is that two communication parties can performbidirectional information transmission using barcodes. This two waycommunication alleviates information asymmetry caused by unidirectionalcommunication and improves service integrity and security. In an exampleof a business transaction, a payer is able to confirm successful paymentto a payee, without needing to communicate with a payment server, whichmay not be available for communication. Another advantage to this methodis that communication to a remote server, for example, a payment server,need not be established by both parties. Two way communication usingbarcodes allows one party to obtain information from a remote server viathe other party.

The previous descriptions are merely preferred implementations of thepresent application, but are not intended to limit the presentapplication. Any modification, equivalent replacement, or improvementmade without departing from the spirit and principle of the presentapplication should fall within the protection scope of the presentapplication.

In a typical configuration, a computing device includes one or moreprocessors (CPUs), one or more input/output interfaces, one or morenetwork interfaces, and one or more memories.

The memory can include at least one of a non-persistent memory, a randomaccess memory (RAM), or a nonvolatile memory in a computer readablemedium, for example, a read-only memory (ROM) or a flash memory (flashRAM). The memory is an example of the computer readable medium.

The computer readable medium includes persistent, non-persistent,removable, and irremovable media that can store information by using anymethod or technology. The information can be a computer readableinstruction, a data structure, a program module, or other data. Examplesof the computer storage medium include but are not limited to aphase-change random access memory (PRAM), a static random access memory(SRAM), a dynamic random access memory (DRAM), a random access memory(RAM) of another type, a read-only memory (ROM), an electricallyerasable programmable read-only memory (EEPROM), a flash memory oranother memory technology, a compact disc read-only memory (CD-ROM), adigital versatile disc (DVD), or another optical storage, a cassette, acassette magnetic disk storage, or another magnetic storage device orany other non-transmission medium. The computer storage medium can beconfigured to store information that can be accessed by the computingdevice. As described in the present specification, the computer readablemedium does not include computer readable transitory media (transitorymedia) such as a modulated data signal and a carrier.

It is worthwhile to further note that, the terms “include”, “comprise”,or their any other variants are intended to cover a non-exclusiveinclusion, so a process, a method, a product, or a device that includesa list of elements not only includes those elements but also includesother elements which are not expressly listed, or further includeselements inherent to such a process, method, product, or device. Withoutmore constraints, an element preceded by “includes a . . . ” does notpreclude the existence of additional identical elements in the process,method, product, or device that includes the element.

A person skilled in the art should understand that an implementation ofthe present application can be provided as a method, a system, or acomputer program product. Therefore, the present application can use aform of hardware-only implementations, software-only implementations, orimplementations with a combination of software and hardware. Inaddition, the present application can use a form of a computer programproduct that is implemented on one or more computer-usable storage media(including but not limited to a disk memory, a CD-ROM, an opticalmemory, etc.) that include computer-usable program code.

Embodiments and the operations described in this specification can beimplemented in digital electronic circuitry, or in computer software,firmware, or hardware, including the structures disclosed in thisspecification or in combinations of one or more of them. The operationscan be implemented as operations performed by a data processingapparatus on data stored on one or more computer-readable storagedevices or received from other sources. A data processing apparatus,computer, or computing device may encompass apparatus, devices, andmachines for processing data, including by way of example a programmableprocessor, a computer, a system on a chip, or multiple ones, orcombinations, of the foregoing. The apparatus can include specialpurpose logic circuitry, for example, a central processing unit (CPU), afield programmable gate array (FPGA) or an application-specificintegrated circuit (ASIC). The apparatus can also include code thatcreates an execution environment for the computer program in question,for example, code that constitutes processor firmware, a protocol stack,a database management system, an operating system (for example anoperating system or a combination of operating systems), across-platform runtime environment, a virtual machine, or a combinationof one or more of them. The apparatus and execution environment canrealize various different computing model infrastructures, such as webservices, distributed computing and grid computing infrastructures.

A computer program (also known, for example, as a program, software,software application, software module, software unit, script, or code)can be written in any form of programming language, including compiledor interpreted languages, declarative or procedural languages, and itcan be deployed in any form, including as a stand-alone program or as amodule, component, subroutine, object, or other unit suitable for use ina computing environment. A program can be stored in a portion of a filethat holds other programs or data (for example, one or more scriptsstored in a markup language document), in a single file dedicated to theprogram in question, or in multiple coordinated files (for example,files that store one or more modules, sub-programs, or portions ofcode). A computer program can be executed on one computer or on multiplecomputers that are located at one site or distributed across multiplesites and interconnected by a communication network.

Processors for execution of a computer program include, by way ofexample, both general- and special-purpose microprocessors, and any oneor more processors of any kind of digital computer. Generally, aprocessor will receive instructions and data from a read-only memory ora random-access memory or both. The essential elements of a computer area processor for performing actions in accordance with instructions andone or more memory devices for storing instructions and data. Generally,a computer will also include, or be operatively coupled to receive datafrom or transfer data to, or both, one or more mass storage devices forstoring data. A computer can be embedded in another device, for example,a mobile device, a personal digital assistant (PDA), a game console, aGlobal Positioning System (GPS) receiver, or a portable storage device.Devices suitable for storing computer program instructions and datainclude non-volatile memory, media and memory devices, including, by wayof example, semiconductor memory devices, magnetic disks, andmagneto-optical disks. The processor and the memory can be supplementedby, or incorporated in, special-purpose logic circuitry.

Mobile devices can include handsets, user equipment (UE), mobiletelephones (for example, smartphones), tablets, wearable devices (forexample, smart watches and smart eyeglasses), implanted devices withinthe human body (for example, biosensors, cochlear implants), or othertypes of mobile devices. The mobile devices can communicate wirelessly(for example, using radio frequency (RF) signals) to variouscommunication networks (described below). The mobile devices can includesensors for determining characteristics of the mobile device's currentenvironment. The sensors can include cameras, microphones, proximitysensors, GPS sensors, motion sensors, accelerometers, ambient lightsensors, moisture sensors, gyroscopes, compasses, barometers,fingerprint sensors, facial recognition systems, RF sensors (forexample, Wi-Fi and cellular radios), thermal sensors, or other types ofsensors. For example, the cameras can include a forward- or rear-facingcamera with movable or fixed lenses, a flash, an image sensor, and animage processor. The camera can be a megapixel camera capable ofcapturing details for facial and/or iris recognition. The camera alongwith a data processor and authentication information stored in memory oraccessed remotely can form a facial recognition system. The facialrecognition system or one-or-more sensors, for example, microphones,motion sensors, accelerometers, GPS sensors, or RF sensors, can be usedfor user authentication.

To provide for interaction with a user, embodiments can be implementedon a computer having a display device and an input device, for example,a liquid crystal display (LCD) or organic light-emitting diode(OLED)/virtual-reality (VR)/augmented-reality (AR) display fordisplaying information to the user and a touchscreen, keyboard, and apointing device by which the user can provide input to the computer.Other kinds of devices can be used to provide for interaction with auser as well; for example, feedback provided to the user can be any formof sensory feedback, for example, visual feedback, auditory feedback, ortactile feedback; and input from the user can be received in any form,including acoustic, speech, or tactile input. In addition, a computercan interact with a user by sending documents to and receiving documentsfrom a device that is used by the user; for example, by sending webpages to a web browser on a user's client device in response to requestsreceived from the web browser.

Embodiments can be implemented using computing devices interconnected byany form or medium of wireline or wireless digital data communication(or combination thereof), for example, a communication network. Examplesof interconnected devices are a client and a server generally remotefrom each other that typically interact through a communication network.A client, for example, a mobile device, can carry out transactionsitself, with a server, or through a server, for example, performing buy,sell, pay, give, send, or loan transactions, or authorizing the same.Such transactions may be in real time such that an action and a responseare temporally proximate; for example an individual perceives the actionand the response occurring substantially simultaneously, the timedifference for a response following the individual's action is less than1 millisecond (ms) or less than 1 second (s), or the response is withoutintentional delay taking into account processing limitations of thesystem.

Examples of communication networks include a local area network (LAN), aradio access network (RAN), a metropolitan area network (MAN), and awide area network (WAN). The communication network can include all or aportion of the Internet, another communication network, or a combinationof communication networks. Information can be transmitted on thecommunication network according to various protocols and standards,including Long Term Evolution (LTE), 5G, IEEE 802, Internet Protocol(IP), or other protocols or combinations of protocols. The communicationnetwork can transmit voice, video, biometric, or authentication data, orother information between the connected computing devices.

Features described as separate implementations may be implemented, incombination, in a single implementation, while features described as asingle implementation may be implemented in multiple implementations,separately, or in any suitable sub-combination. Operations described andclaimed in a particular order should not be understood as requiring thatthe particular order, nor that all illustrated operations must beperformed (some operations can be optional). As appropriate,multitasking or parallel-processing (or a combination of multitaskingand parallel-processing) can be performed.

1.-20. (canceled)
 21. A computer-implemented method for barcode-basedcommunication, the computer-implemented method comprising: determining,by one or more processors of a first device, first transmissioninformation to send to a second device, the first transmissioninformation comprising a service request, and a user accountinformation; generating, by the one or more processors of the firstdevice, a first barcode based on the first transmission information;displaying, by the first device, the first barcode for scanning by thesecond device during a predetermined display time; determining, by theone or more processors of the first device, that the predetermineddisplay time expired; retrieving, by the first device using a near fieldcommunication method, a second barcode generated by the second device,the second barcode comprising second transmission information generatedby the second device based on a processing result of the firsttransmission information, the second transmission information comprisinga service result and a display adjustment request specifying amodification of a display parameter of the first device, wherein thedisplay parameter comprises at least one of a screen brightness and acamera status; retrieving, by the one or more processors of the firstdevice, the second transmission information by processing the secondbarcode; adjusting, by the one or more processors of the first device,the display parameter of the first device based on the displayadjustment request of the second transmission information; and inresponse to adjusting the display parameter, redisplaying, by the firstdevice, the first barcode for scanning by the second device to completea service without connecting to a remote server.
 22. Thecomputer-implemented method of claim 21, wherein retrieving, by thefirst device using a near field communication method, a second barcodegenerated by the second device comprises scanning by the first deviceusing a near field communication method, a second barcode displayed bythe second device.
 23. The computer-implemented method of claim 21,wherein the first transmission information comprises device controlinformation and communication control information, the device controlinformation being used to perform at least one of: controlling a workingstatus parameter of the second device, and performing a specificfunction operation, and wherein the communication control information isused to notify the second device of at least one of a current progressand a subsequent procedure of information exchange.
 24. Thecomputer-implemented method of claim 21, wherein the second transmissioninformation further comprises instructions for at least one of: changinga working status parameter of a local device based on the displayadjustment request in the second transmission information; performing aspecific function operation based on the display adjustment request inthe second transmission information; determining a current progress ofinformation exchange with the second device based on the displayadjustment request in the second transmission information; andperforming a subsequent procedure of the information exchange with thesecond device based on communication control information in the secondtransmission information.
 25. The computer-implemented method of claim21, wherein the method further comprises: initiating a prompt signalafter communication with the second device ends.
 26. Thecomputer-implemented method of claim 25, wherein the prompt signalcomprises at least one of a vibration or a tone, indicatingcommunication with the second device has ended.
 27. Thecomputer-implemented method of claim 21, wherein the second devicecomprises a payee device and the first device comprises a payer device,and wherein the first barcode is a payment barcode comprising payeraccount information.
 28. A non-transitory, computer-readable mediumstoring one or more instructions executable by a computer system toperform operations comprising: determining, by a first device, firsttransmission information to send to a second device, the firsttransmission information comprising a service request, and a useraccount information; generating, by the first device, a first barcodebased on the first transmission information; displaying, by the firstdevice, the first barcode for scanning by the second device during apredetermined display time; determining, by the first device, that thepredetermined display time expired; retrieving, by the first deviceusing a near field communication method, a second barcode generated bythe second device, the second barcode comprising second transmissioninformation generated by the second device based on a processing resultof the first transmission information, the second transmissioninformation comprising a service result and a display adjustment requestspecifying a modification of a display parameter of the first device,wherein the display parameter comprises at least one of a screenbrightness and a camera status; retrieving, by the first device, thesecond transmission information by processing the second barcode;adjusting, by the first device, the display parameter of the firstdevice based on the display adjustment request of the secondtransmission information; and in response to adjusting the displayparameter, redisplaying, by the first device, the first barcode forscanning by the second device to complete a service without connectingto a remote server.
 29. The non-transitory, computer-readable medium ofclaim 28, wherein retrieving, by the first device using a near fieldcommunication method, a second barcode generated by the second devicecomprises scanning by the first device using a near field communicationmethod, a second barcode displayed by the second device.
 30. Thenon-transitory, computer-readable medium of claim 28, wherein the firsttransmission information comprises device control information andcommunication control information, the device control information beingused to perform at least one of: controlling a working status parameterof the second device, and performing a specific function operation, andwherein the communication control information is used to notify thesecond device of at least one of a current progress and a subsequentprocedure of information exchange.
 31. The non-transitory,computer-readable medium of claim 28, wherein the second transmissioninformation further comprises instructions for at least one of: changinga working status parameter of a local device based on the displayadjustment request in the second transmission information; performing aspecific function operation based on the display adjustment request inthe second transmission information; determining a current progress ofinformation exchange with the second device based on the displayadjustment request in the second transmission information; andperforming a subsequent procedure of the information exchange with thesecond device based on communication control information in the secondtransmission information.
 32. The non-transitory, computer-readablemedium of claim 28, wherein the operations further comprise: initiatinga prompt signal after communication with the second device ends.
 33. Thenon-transitory, computer-readable medium of claim 32, wherein the promptsignal comprises at least one of a vibration or a tone, indicatingcommunication with the second device has ended.
 34. The non-transitory,computer-readable medium of claim 28, wherein the second devicecomprises a payee device and the first device comprises a payer device,and wherein the first barcode is a payment barcode comprising payeraccount information.
 35. A computer-implemented system, comprising: oneor more computers; and one or more computer memory devices interoperablycoupled with the one or more computers and having tangible,non-transitory, machine-readable media storing one or more instructionsthat, when executed by the one or more computers, perform one or moreoperations comprising: determining, by a first device, firsttransmission information to send to a second device, the firsttransmission information comprising a service request, and a useraccount information; generating, by the first device, a first barcodebased on the first transmission information; displaying, by the firstdevice, the first barcode for scanning by the second device during apredetermined display time; determining, by the first device, that thepredetermined display time expired; retrieving, by the first deviceusing a near field communication method, a second barcode generated bythe second device, the second barcode comprising second transmissioninformation generated by the second device based on a processing resultof the first transmission information, the second transmissioninformation comprising a service result and a display adjustment requestspecifying a modification of a display parameter of the first device,wherein the display parameter comprises at least one of a screenbrightness and a camera status; retrieving, by the first device, thesecond transmission information by processing the second barcode;adjusting, by the first device, the display parameter of the firstdevice based on the display adjustment request of the secondtransmission information; and in response to adjusting the displayparameter, redisplaying, by the first device, the first barcode forscanning by the second device to complete a service without connectingto a remote server.
 36. The computer-implemented system of claim 35,wherein retrieving, by the first device using a near field communicationmethod, a second barcode generated by the second device comprisesscanning by the first device using a near field communication method, asecond barcode displayed by the second device.
 37. Thecomputer-implemented system of claim 35, wherein the first transmissioninformation comprises device control information and communicationcontrol information, the device control information being used toperform at least one of: controlling a working status parameter of thesecond device, and performing a specific function operation, and whereinthe communication control information is used to notify the seconddevice of at least one of a current progress and a subsequent procedureof information exchange.
 38. The computer-implemented system of claim35, wherein the second transmission information further comprisesinstructions for at least one of: changing a working status parameter ofa local device based on the display adjustment request in the secondtransmission information; performing a specific function operation basedon the display adjustment request in the second transmissioninformation; determining a current progress of information exchange withthe second device based on the display adjustment request in the secondtransmission information; and performing a subsequent procedure of theinformation exchange with the second device based on communicationcontrol information in the second transmission information.
 39. Thecomputer-implemented system of claim 35, wherein the operations furthercomprise: initiating a prompt signal after communication with the seconddevice ends.
 40. The computer-implemented system of claim 39, whereinthe prompt signal comprises at least one of a vibration or a tone,indicating communication with the second device has ended.